✨ [RUMF-1000] add a custom time parameter to addTiming

[BenoitZugmeyer]

Motivation

Allow users to pass a custom time parameter to addTiming. Particularly useful in async setups, see #1005

Changes

• support relative and absolute times in view.addTiming
• add custom timing parameter support

Testing

CI

---

I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Merging #1079 (2d9bd99) into main (57ceab0) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1079      +/-   ##
==========================================
+ Coverage   89.16%   89.17%   +0.01%     
==========================================
  Files          90       90              
  Lines        4170     4174       +4     
  Branches      951      952       +1     
==========================================
+ Hits         3718     3722       +4     
  Misses        452      452              

Impacted Files	Coverage Δ
packages/core/src/tools/timeUtils.ts	94.28% <100.00%> (+0.34%)	⬆️
packages/core/src/tools/utils.ts	87.14% <100.00%> (+0.06%)	⬆️
packages/rum-core/src/boot/rumPublicApi.ts	97.91% <100.00%> (ø)
.../src/domain/rumEventsCollection/view/trackViews.ts	97.89% <100.00%> (+0.02%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 57ceab0...2d9bd99. Read the comment docs.